The parallax of the bright star Vega is about 0.13 arcseconds. What is the distance of Vega from the Sun

What are similarities and differences between refraction, reflection, diffraction and absorption?

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers total displacement?